The industrial production (IP) index measures the real output of all relevant establishments located in the United States, regardless of their ownership, but not those located in U.S. territories.
NAICS = 3311,2pt.
Source Code: IP.N3311A2Z.N
Board of Governors of the Federal Reserve System (US), Industrial Production: Manufacturing: Durable Goods: Miscellaneous Steel (NAICS = 3311,2pt.) [IPN3311A2ZN], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/IPN3311A2ZN, May 12, 2021.